1. Pistons, Rings & Piston Kits Products
  2. sku: 11771514647678983
  3. YAMAHA 2K6-11636-00

YAMAHA 2K6-11636-00 Nos Piston .50

fits model: Yz125. make: Yamaha. year: 1978–1980.

2k6-11636-00 Yamaha 1978-1980 Yz125 Nos .50 Oversize Piston

( Manufacturer Part Number: 2K6-11636-00 ), ( Part Type: Piston ), ( Country Of Origin: United States ), ( Manufacturer Warranty: Unspecified Length ), ( Storage Location: J8 Crp1-n Buk 57 )

Review YAMAHA Nos .50 Oversize Piston fits YZ125 1978–1980

The Yamaha YZ125 NO.S 50 Piston is a replacement part designed for Yamaha YZ125 motorcycles manufactured between 1978 and 1980. This piston is a crucial component of the engine, responsible for transferring the force of the exploding fuel-air mixture to the crankshaft, thereby propelling the motorcycle forward.

The NO.S 50 piston is made from a high-quality aluminum alloy, ensuring both lightweight and durability. Its compression ratio is specifically engineered for the YZ125 engines of the mentioned era, ensuring optimal engine performance. The piston skirt is designed to provide a snug fit within the engine cylinder, ensuring minimal clearance and maximum efficiency. The piston crown is dome-shaped to accommodate the combustion process, providing ample space for the expanding gases to push down on the piston.

The piston also features a ringset that includes a compression ring, an oil control ring, and a skirt oil scraper ring. These rings help maintain the engine's compression and control the oil consumption, ensuring the engine runs smoothly and efficiently. The piston rings are made from a high-temperature, wear-resistant material to ensure they last as long as possible.

The NO.S 50 piston comes with a piston pin, piston pin retainer, and piston ring compressor tool, making it a complete kit for an easy installation process. The piston pin is made from high-strength steel, providing the necessary rigidity and durability to transmit the engine's power to the crankshaft. The piston pin retainer ensures the piston pin remains securely in place during engine operation. The piston ring compressor tool makes the process of installing the piston rings easier and more efficient.

In summary, the Yamaha YZ125 NO.S 50 Piston is a high-quality replacement part designed for Yamaha YZ125 motorcycles manufactured between 1978 and 1980. It is made from a high-quality aluminum alloy, ensures optimal engine performance, and comes with a complete kit for an easy installation process.

Buying a used Yamaha YZ125 with a 1978-1980 model year and a 50 piston (which is actually a 49.8mm bore size) can be an enticing prospect for vintage motocross enthusiasts. Here are some pros and cons to consider before making a purchase.

Pros:

1. Authenticity: These bikes are considered classics in the motocross community, and owning one can add to your collection or enhance your racing experience.

2. Affordability: Compared to buying a new motorcycle, used bikes generally offer a more budget-friendly option.

3. Parts Availability: Since these bikes have been in production for a while, there is a good selection of aftermarket parts available.

4. Reliability: With proper maintenance, these bikes can be quite reliable, making them a good option for weekend riders and vintage racing enthusiasts.

5. Character: Older motorcycles like the YZ125 have a unique charm that newer models can't replicate.

Cons:

1. Maintenance: Older motorcycles require more frequent maintenance than newer models.

2. Performance: Compared to modern motorcycles, the performance of a 1978-1980 YZ125 may not be as impressive.

3. Safety: Older motorcycles may not meet the latest safety standards.

4. Rare Parts: Some parts for these bikes can be difficult to find and may require significant searching or custom fabrication.

5. Restoration: If you plan on restoring the bike, it can be a time-consuming and costly process.

Ending Conclusion:

A used Yamaha YZ125 with a 1978-1980 model year and a 50 piston is an attractive option for vintage motocross enthusiasts. These bikes offer a unique blend of authenticity, affordability, and character, but they also come with their own set of challenges, such as the need for frequent maintenance and the availability of rare parts.

If you are looking for a bike to ride on weekends or participate in vintage racing events, this bike could be a great choice. However, if you are a beginner or looking for a modern motorcycle with the latest features and performance, this may not be the best option for you.

Recommendation:

If you decide to purchase a used Yamaha YZ125, make sure to thoroughly inspect the bike before making the purchase. Look for any signs of rust, damage, or wear. Also, consider having the bike inspected by a professional mechanic to ensure that it is in good working order. Finally, budget for the ongoing maintenance and potential restoration costs. With proper care and attention, you can enjoy the unique experience of owning a vintage motocross bike.

Details:

Do you accept offers?, Some listings offers. We review all reasonable offers promptly. This is a NOS New Old Stock genuine Yamaha piston.50 oversize, part number 2K6-11636-00. Look for the Make Offer button on listing page.

FREE shipping on every order to the lower 48 states. We started with a single motorcycle dismantled in home garage. Spotlight: A Day Inside . Residential delivery with lift gate is available.

4.8 out of 5 stars across 322 reviews.: Are these genuine OEM parts?, Yes. Do you combine shipping?, Yes. Every part is one-of-a-kind.

It is specifically designed for the 1978-1980 Yamaha YZ125 model's, ideal engine rebuilds. Item must be in original, uninstalled condition with no modifications. To Watch. Please verify the part number and compatible model's before purchasing.

part #: 2k61163600 prices

  • $12.09-$29.68

specifications pistondon:

  • for models: Yz125
  • for makes: Yamaha
  • for years: 1978-1980
  • mpn: 2k6-11636-00
  • part type: Piston
  • country of origin: United States
  • manufacturer warranty: Unspecified Length
  • storage location: J8 Crp1-n Buk 57

offer pistondon:

  • started: April 11, 2026
  • options: Ship-to-home
  • best offers: True
  • sold: 0
  • availability: In Stock
  • quantity: 1

general pistondon:

  • condition: New other see details
  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits

shipping pistondon:

  • class: Standard, Expedited, One-day
  • carrier: USPS, FedEx
  • type: Fixed
  • cost: $0.00
  • service: USPS Ground Advantage, USPS Priority Mail, FedEx 2Day, Overnight
  • transit: 5-9 Days

payments pistondon:

  • credit card: Mastercard
  • other
  • wallet: Paypal

seller pistondon:

  • rating: 99.4%
  • # reviews: 221774
  • city: Odessa, Florida

returns pistondon:

  • time: 30 Days
  • paid by: Seller
  • policy: Returns Accepted
for models: yz125, for makes: yamaha, for years: 1978-1980, part type: piston, country of origin: united states, manufacturer warranty: unspecified length, storage location: j8 crp1-n buk 57,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 11771514647678983,

Yamaha 2K6-11636-00 Is Similar To:

pistondon logo
5 offers $12.09–$29.68 USD
  • Offer #1: $12.09 price + $6.00 shipping estimate = $18.09* total.+$6.00 shipping
  • Offer #2: $29.68 price + $0.00 shipping estimate = $29.68* total. Fits: Fits 1978-1980 Yamaha YZ125 motorcycles It is specifically designed for the 1978-1980 Yamaha YZ125 models, ideal for engine rebuilds.FREE SHIPPING
  • Offer #3: $25.00 price + $6.00 shipping estimate = $31.00* total. PART: NEW YAMAHA OEM NOS PISTON / / YZ125 1978-80.+$6.00 shipping
  • Offer #4: $32.00 price + $0.00 shipping estimate = $32.00* total. -56.50mm piston. NEW OEM/NOS YAMAHA YZ125 PISTON.FREE SHIPPING
  • Offer #5: $24.95 price + $9.51 shipping estimate = $34.46* total. Fits YZ125(78-80). Yamaha.+$9.51 shipping

Copyright © pistondon.com